USB Power Delivery Specs finalised, 100W over USB

[naokaji]

Yep, sometime in the future we will be able to draw 100W over USB, say goodbye to power supplies for USB devices

The USB Power Delivery Specification has finally been approved by the USB 3.0 Promoter Group and the USB 2.0 Promoter Group arms of the USB Implementers Forum, meaning manufacturers are now able to create standards-compliant systems providing up to 100W of power to client devices.

The USB 3.0 Promoter Group - a conglomeration of companies including Hewlett-Packard, Intel, Microsoft, Renesas, ST-Ericsson and Texas Instruments - is pushing the USB Power Delivery Specification as an upgrade to its 2008 USB 3.0 specification. While performance is unmodified over USB 3.0, power availability gets a significant boost with client devices able to demand up to 100W from host systems.

Source:

http://www.bit-tech.net/news/hardwar...wer-delivery/1

[CrazyNutz]

Wow that would be 20amps

[Xenogias]

say hello to THICK cables

[Scubar]

USB 3.0 header to Kettle lead FTW !!!!!!!

[Frodin]

I'd rather not route more power through a laptop and its power supply, so I don't really know how I feel about this.

[El Mano]

What about the plastic surrounding the USB connectors?
Can it get that hot?

[[XC] Oj101]

Goodbye powered USB hubs

[Sparky]

What about the plastic surrounding the USB connectors?
Can it get that hot?

It shouldn't get hot if the connection is good. Does your desktop PC power cord get hot? It is pulling a lot more than 100W

[BeepBeep2]

So, say hello to actually usable USB TEC drink chillers?

[grasskicker509]

So, say hello to actually usable USB TEC drink chillers?

heck ya! boozing n gaming never got easier

[Sparky]

Oh yeah

[El Mano]

It shouldn't get hot if the connection is good. Does your desktop PC power cord get hot? It is pulling a lot more than 100W

You mean USB cables are going to be that thick?

[highoctane]

Wow 100w over USB, that has got to be total not per header.

Won't need power strips no more, just usb plug everything into your desktop.

[bamtan2]

I'd rather not route more power through a laptop and its power supply, so I don't really know how I feel about this.

what a strange comment. if you dont want to hook up a power over usb component then don't. you certainly have nothing that can do it.

[cobra_kai]

It shouldn't get hot if the connection is good. Does your desktop PC power cord get hot? It is pulling a lot more than 100W

It's also 120VAC... not 5VDC. So for equal power you're pulling 24x the amperage (not even taking into account gains in voltage from rectification) so yeah it's gonna need some thick cables.

[EniGmA1987]

Makes me wonder about USB displays. A lot of LCD monitors draw less than 100w now. We may be able to get away with a single USB cable to both power and send video to a monitor soon. And with the USB we could even send touch feedback on the same cable. Very useful for business point of sale systems and such.

[BeepBeep2]

Makes me wonder about USB displays. A lot of LCD monitors draw less than 100w now. We may be able to get away with a single USB cable to both power and send video to a monitor soon. And with the USB we could even send touch feedback on the same cable. Very useful for business point of sale systems and such.

Most LED backlit monitors only draw 10-15w anyway...

Dell and HP etc. are all really pushing all-in-one iMac type PCs now with touch screens, which are so desirable and so proprietary, I believe they will shut out the custom PC market.

[NEOAethyr]

While it sounds like fun to stack up a bunch of hubs without needing extra power...
It's not a good idea I think.

Like cobra_kai said, it's dc, much more lossy then ac.

Like Frodin was saying I think, adapting notebooks to this could be an issue...
Imagine 3 usb3 ports at 100w each, and the laptop it's self ruffly 100w.
Bigger psu, 3x less battery life, etc.

USB TEC drink chillers?
Are you nuts lol , that's alot of power waste .

100w wireless network adapters, 500db (I dn the actual lol), melts your lap if used in a laptop.
Reaches across the state...
Sounds good to me :P.

Seriously though, 100w?
Usb 24in fans?, what in the world would you need so much for...

A simple, not quite accurate calculation.
22awg, alu, 5ft, 6v 20a.
Voltage drop = 6.467v, 107.78%.
Voltage at the end = -0.46699999999999964v.
^^ have fun with that...

I goto plug in some random usb2 ext cable, 6ft...
Throw my 100w wireless adapter on it, throw it outside.
Thinking that the internet isn't that fast anyways, so it don't need usb3...
And my house catches fire...

[kuroikenshi]

So, say hello to actually usable USB TEC drink chillers?

or to keep your coffee warm too!!

[NEOAethyr]

Or maybe charge your electric lawn mower...

[BeepBeep2]

USB TEC drink chillers?
Are you nuts lol , that's alot of power waste .

A 20w TEC with acceptable hot-side heatsink would suffice. 20w is rather negligible...
You ever been to a lanparty? Guess not

Then again it is easy to wire a molex connector to a 12v TEC in case anyone wanted to try it. (non-noobs of course)

or to keep your coffee warm too!!

Yeah!

[CrazyNutz]

It's also 120VAC... not 5VDC. So for equal power you're pulling 24x the amperage (not even taking into account gains in voltage from rectification) so yeah it's gonna need some thick cables.

Actually no. If its 120vac the cables would not need to very thick at 100w. 100w / 120v would only be 833 milliamps (0.833 amps)

[kuroikenshi]

A 20w TEC with acceptable hot-side heatsink would suffice. 20w is rather negligible...
You ever been to a lanparty? Guess not

Then again it is easy to wire a molex connector to a 12v TEC in case anyone wanted to try it. (non-noobs of course)


Yeah!

brings me back to the days when I used to do Direct TEC cpu cooling..... lol I was naive enough to think it could work... or maybe it could on IB since the thermal output is not so ourageous

[cobra_kai]

Actually no. If its 120vac the cables would not need to very thick at 100w. 100w / 120v would only be 833 milliamps (0.833 amps)

Yes, that is my point. PSU power cables don't need to be that thick because they are transporting relatively high voltage. 100 watts at 5VDC (assuming the USB voltage remains the same) is 20 amps, which according to the NEC specifications requires a minimum of 14 gauge wire probably more like 12 or 10 if you are talking about continuous draw.

[babalouj]

if USB 3.0 does something similar to POE (power over ethernet), then they can use multiple conductors (Power, Data+, Data-, SSRX+, SSRX-, SSTX+ and SSTX-) to carry the amperage. Its a very common trick in the RF world using dc blocking capacitors and chokes to separate the DC voltage and signal. With 7 wires/conductors they could end up getting away with a relatively small gauge of wire (assuming that a dedicated GND wire and a beefy shield is enough for the amperage).